Question

Put the verbs in brackets into the simple past or past perfect form. (3)

i. When the students ________ (do) the experiment they _______ (write)

a report on it?

ii. It was a good story, but I __________ (hear) it before​

Answer 1

i. When the students had done the experiment they had written a report on it?

ii. It was a good story, but I had heard it before.

Answer 2

Answer:

Explanation:

1. had done ,  wrote

2. had heard